3 packages of Rainbow Tapioca Pearls. Low in saturated fats, great for a gluten-free diet. Use tapioca to make a number of delicious recipes. Grown in the tropics, the cassava or tapioca plant produces a fleshy edible root stock. A nutritious starch is extracted from cassava and formed into pearls. Here's where to buy tapioca pearls or tapioca balls! These tapioca pearls are small.